Effect of Hexamethylene Tetramine (HMTA) Surfactant on the Structural Characteristics and Photocatalytic Activity of Cu-ZnO Nanoparticle Materials Fabricated by the Hydrothermal Method . Vietnam j. catal. adsorp. 2021, 10 (3), 34-39. https://doi.org/10.51316/jca.2021.047.